Tube-cuffing device for stripping machines



April 30, 1929. H. 'Dfis'rEvENs 1,711,474

TUBE CUFFING' DEVICE F013 STRIPPING MACHrNES Filed July 17, 1925 '2sheets -shget 1 INVENTOR.

flak/7c: D. 67': news I ATTORNEY.

April 30, 1929.;

Filed July 17, 1925- 2 Sheets-Sheet 2 i l i, /5 l7 15 17 ,5 )2 INVENTOR.l l l florwce D. STEVENS Fig-5 ATTORNEY.

Patented Apr. 30, 1929.

UNITED STATES PATENT oF FICE.

HORACE n. STEVENS, on AKRON. 'onro', nssrenonro THE rrnnsrronn TIRE ANDnnre- BER COMPANY, OF AKRON, OHIO, A CORPORATION DIE O I'IIO.

morn-comma DEVICE non srnrrrrne MACHINES.

Application fil ed Ju1y 17, 1925. Serial M44 80.

This invention relates to devices for cutting the ends of Vulcanizedinner tubeswhlle on their mandrels over the end or muzzle of a gun1npreparation for the tube-stripping stripping action.

In the co-pending application of Horace D. Stevens and Edward D. Putt,Serial No.

3,002, filed January 17, 1925, there is dis- I closed a mechanism forstripping lnner tubes v consisting of an air cylinder or gun forreceiving the mandrels having the tubes thereon. and arranged to besupplied wlth air under.

pressure so that when an end of the tube is cufled back onto the gun andthe mandrel is withdrawn, the air will maintain the reversely turnedportion ofthe tube expanded away from the portion'of the tubeon themandrel to prevent friction of the turned portion on that portion on themandrel which would be so great as to prevent the stripping operationbeing carried out.

It has been found thatthe cufling of the tube-on the muzzle of the gunwhich has heretofore been accomplished by handis'an ex ceedinglyfatiguing operation on the fingers, thestretching of the tuberequiringthe eX- penditure of great strength and causing a sort ofparalytic condition in the hand and bleeding about the finger nailsafter the cuffing operations have been repeated anumber.

of times.

The general objectof the present invention is to provide a device forcuffing the tube onto the muzzle of thegun. 1 r

A particular object istoprovide a device carrying a series ofcontractible and expansible fingers, arranged to have the tube easilycufled thereon when contracted and adapted to expand the cuff onto themuzzleof the gun. A further object is to provide a device of the typedescribed above which will be inovable on the gun and will be operableby the muzzle of the gun due to such movement.

' The foregoing and other objects are obtained by the constructionillustrated in the accompanying. drawings and described below. It is tobe understood that the inven- 'tion. is not limited to the specific formthereof shown and described. 1 I I Of the accompanying drawings: j 1Figure 1 1s a side elevation of a device embodying the invention mountedon a gun and" 1 shown 1n position for a cutting operat on- Figure 2 is asimllar view showing the first step of the cutting operation;

' completed operation and- Figure 3 is a similar view illustrating themanner in which the fingers are spread to X-- pand-the cuff onto themuzzle of the gun; V

Figure 4 is a similar viewillustrating the F 1gure-5 is an'end elevationend of a stripping gun, containing a mandrel 11 projecting therefrom,the mandrel 11 hav ing a tube 12 thereon which is to be strippedtherefrom.

The cufling device of theinvention includes a sleeve 13 slidablei on gun:10 adjacent the muzzle thereof'and having pivoted thereon acircumferential series (in this case four) of fingers 14, 14 each formedwith spaced prongs 15, 15 adapted to engage the outer surface 1 of tube12 in-the manner shown in Figure 1. Fingers 14, 14 are normally urged orcontracted inwardly by means of tensile springs 16, 16 connected betweenpins 17, 17 mounted on the fingers 14.

Initheoperation of the device the sleeve 13 is moved toward the muzzleend of gun 1O until fingers 14 lie on tube 12 substantially as shown inFigure 1. The tube is then easof the fingers 14 as shown in Figure 2.

Sleeve 13 is now moved away from the muzzle of gun lO'and theinnersurfa'ces of fin gers 14 engage the muzzleof the gun and'are spreadthereby against the action of springs 16 to expand and carrythereverselyturned end of thetube onto the muzzle 10 in the manner illustrated inFigure 3. Movement of the sleeve 13 away from the muzzlefis con-:

tinued until the entire projecting portion of the tube 12 on the mandrel11 has been cuffed back onto thegun and the fingers'14 withdrawn frombeneath the cuff as is illustrated in Figure 4. v 1 i It will appearfromthe foregoing that the manual part of the cufiingoperation has beenreduced to an easily andquickly accomplished step and that the device isadapted to per form the diifiou'ltrstretching. operation which has beenobjectionable in the use of mechan ical stripping devices in'the past. 7

Modifications of the invention maybe resorted to without departingthereoforthe scope of the appended claims.

' What I claim -1s:

v '1. vApparatus of the class described, comprising the combination witha cylinderfor from the splrit,

receiving aniandrel, of; adevice for cuffing theendof atube on saidmandrel onto the end of said cylinder, sald device including a series ofpivoted fingers a mounting for the fingers s'licl'able"'onthe'icylinder;and yielding means normally tendingto contract'the'lingers wherebymoyement of the-mounting on the cylinder will efiect a spreading of thefingers against the action of said yielding means mandrel; a mountingmovable on the oylin- 1 finge'rs carried bythe mounting and normal-' lytending to contract/to a diameter'less than 1 that ot the' cylinder' butadaptedto be exby engagement of the fingers with the end of T thecylinder.

1 EZJ APparatus of the class. described, comprising a cylinderforreceivingan inner tube der, and a circuliiferen'tial series of yieldablepanded' to' the diameter of the cylinder *by ao -eiigagement therewith;

= 3. Apparatus oi the class described, comprising a cylinder forreceiving an inner tube *-1nan'clrel,"' and a' 'dev1cemovable along the=cylinder-including aseries of fingerstending onto'thevcylinder, saidmeans comprising a movable mounting and a circumferential series ofyielding fingers on the mounting arranged about the 1 cylinder.

55Apparatus of the class described; comprisingthe combination With ahollow cylinderof means movable thereon for cutting over the end of thecylinder a tube arranged Within "and'projecting fromthe cylinder on "thecylinder. 1

TGJ'A devlce'of the class-described, comprising" a sleeve; acircumferential" series of contractible and expansible fingers on saidsleeve; and means A normally yieldingly contracting the fingers.

1 HORACE n. STEVENS.

